METHOD FOR PRODUCING NATURAL RUBBER CARBON MASTER BATCH AND NATURAL RUBBER CARBON MASTER BATCH PRODUCED BY THE METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a natural rubber carbon master batch useful for natural rubber compositions suppressed in reduction of the average molecular weight of the natural rubber and improved in reinforcement, abrasion resistance, adhesiveness to steel cords and the like, and the natural rubber carbon master batch produced therefrom.;SOLUTION: The method for producing the natural rubber carbon master batch comprises a process for mixing the natural rubber with a carbon black slurry in a liquid phase and a coagulation process. In the method, the pH of the liquid phase in the coagulation process is 8-10 and the natural rubber in the coagulated product has ≥8.0×10⁵ weight average molecular weight.;COPYRIGHT: (C)2007,JPO&INPIT